monitor switch

Hi,

Good Day!

I bought a PreSonus Firepod 2 years ago and it's good and serve me good till now.

Now, i'm actually looking for a Studio Monitor Switcher for audition/comparison when Mixing.

Kev, this may be one for you.. you seem like an electronicsy type guy.

I'm building a monitor switch so a can choose between input from a CD player or DAW, and output to either Monitors (powered) or headphone amp...

Can anyone recommend a monitor switching device to me? I've got two or maybe three monitors and one power amp - i'd like to switch between them easliy without changing the sound at all - so something passive (right?).

Hey all.
I tried asking this somwhere else, but Im not getting an answer, so Ill try here.